Sadly, a lot of your German experience boils down to your house and who owns it. I’ve met a lot of people who’ve been miserable because of a problematic house and an unresponsive and even dishonest landlord. Though our legal and housing offices do their best, they can’t always solve every issue that comes up.
Do know your tenant rights and do ask around about landlords. Ask at the housing office and read up on google. There are several sites that talk about these things.
Please leave your landlord experiences both good and bad in the comments section so that we can help others. Check the comments for bad landlords! You don’t want those kind of headaches.